thawing

To gradually melt, dissolve, or become fluid; to soften from frozen

“the ice thaws”

To become so warm as to melt ice and snow — said in reference to the weather, and used impersonally.

“It's beginning to thaw.”

To grow gentle or genial.

“Her anger has thawed.”

To gradually cause frozen things (such as earth, snow, ice) to melt, soften, or dissolve.

The process by which something thaws.